CN108877762A - A kind of multi-channel Active Noise radiation control system error microphone lays method - Google Patents
A kind of multi-channel Active Noise radiation control system error microphone lays method Download PDFInfo
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- CN108877762A CN108877762A CN201810485569.XA CN201810485569A CN108877762A CN 108877762 A CN108877762 A CN 108877762A CN 201810485569 A CN201810485569 A CN 201810485569A CN 108877762 A CN108877762 A CN 108877762A
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- sound source
- error microphone
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- primary sound
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1781—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions
- G10K11/17821—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the input signals only
- G10K11/17823—Reference signals, e.g. ambient acoustic environment
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1781—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions
- G10K11/17821—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the input signals only
- G10K11/17825—Error signals
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- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
Method is laid the invention discloses a kind of multi-channel Active Noise radiation control system error microphone.The present invention is directed to the multiple channel acousto radiation control of free space primary sound source, proposes centered on primary sound source, secondary sound source is spherical uniformly to be laid, and optimization of region goes out the optimum arrangement position of error microphone between primary sound source and secondary sound source.Error microphone cloth is placed between primary sound source and secondary sound source by this method, realizes close-coupled system, and in system channel number abundance, is influenced by primary sound source characteristic small, is implemented simple.
Description
One, technical field
The present invention relates to Active noise control fields.Propose a kind of multi-channel Active Noise radiation control system error biography
Sound device lays method, for realizing effective noise control in free found field.
Two, background technique
In Active control, free space overall situation acoustic radiation control system usually needs near primary sound source using a large amount of
Secondary sound source and error microphone, the sky between secondary sound source and primary sound source is depended in the big degree of the performance of control system
Between distance, and influenced (Nelson PA, Curtis ARD, Elliott by the number and location of secondary sound source and error microphone
SJ, Bullmore AJ.The minimum power output of free field point sources and the
active control of sound.J Sound Vib.1987；116(3)：397-414.).In these active guidance systems
In, secondary sound source lays the maximum value that decide theoretical noise reduction, and laying for error microphone decides practical noise reduction
Size.To realize a compact control system, it is necessary to solve the problems, such as that secondary sound source and near field error microphone are laid.
Although the secondary sound source of the single channel control system of monopole primary sound source and 2 channel control systems in free space
Problem existing research (Hansen C, Snyder S, Qiu X, Brooks L, Moreau D.Active is laid with error microphone
Control of Noise and Vibration, Second Edition.Crc Press.2012 and Hayashi T,
Enamito A, Suzuki S.Active acoustic power control of a single primary and two
secondary sources by the acoustic nodal point method.J Acoust Soc Jpn.1995；16
(4)：213-21.), but it is no matter real in Analysis of The Acoustic Fields or system for the multichannel overall situation control problem of general primary sound source
It is all very difficult on now.Especially in the selection that error pick-up lays strategy, need to consider simultaneously the simplicity of control program
With the anti-acoustic capability of control system.Chinese patent discloses CN106504739 and CN104036065 and all proposes global active noise control
The error pick-up of system lays method, but both based on enclosure spaces such as cabins, and the compactedness of control system is not considered.
Still lack the optimum arrangement of the near-field acoustic pressure error pick-up for free space generality sound source multi-channel control system at present
Strategy.
The present invention is controlled for the multichannel overall situation acoustic radiation of free space primary sound source, secondary centered on primary sound source
Sound source is spherical uniformly lays for grade, and optimization of region goes out the optimum arrangement position of error microphone between primary sound source and secondary sound source
It sets, to realize multichannel compact control system.Since this method uses near field sensing strategy, error microphone cloth is placed on primary
Between sound source and secondary sound source, system compact, and noise reduction is big；In system channel number abundance, the position of Optimal error microphone
Set is influenced small by primary sound source characteristic, is implemented simple.
Three, summary of the invention
1, goal of the invention：It is proposed a kind of side of laying of effective multi-channel Active Noise radiation control system error microphone
Method is controlled for the global acoustic radiation in free space, is applicable to different types of primary sound source.
2, technical solution：For achieving the above object, multi-channel active described in method proposed by the invention is made an uproar
Acoustic control system error microphone to lay schematic diagram as shown in Fig. 1.The present invention specifically includes following steps：
(1) background environment of primary sound source is investigated, it is ensured that control environment is free space.By measuring primary sound source
The feature dimensions such as length or radius determine the position of primary sound source geometric center.By primary sound source surface and geometric center
Farthest distance is labeled as the scale L of primary sound source.By the scale L of primary sound source and the 0.3 of highest goal frequency corresponding wavelength
Compare again, if less than 0.3 times wavelength of L, carries out (2) step；If L is greater than 0.3 times of corresponding wavelength, it is not suitable for this method.
(2) select the loudspeaker with back chamber as secondary sound source, using the geometric center of primary sound source as the centre of sphere, secondary sound source
It is spherical to be uniformly distributed, tetrahedral 4 apexes for example, secondary sound source placement can be positive, 6 vertex of regular octahedron
Place, 8 apexes of regular hexahedron, 12 apexes of regular dodecahedron, regular dodecahedron 20 apexes.Each secondary sound
Distance primary sound source geometric center in source is d, and d is necessarily less than 0.5 times of highest goal frequency corresponding wavelength, furthermore according to scene
Physical condition and operating space should make d as small as possible.
(3) according to the computing resource of controller and noise reduction index, the number of secondary sound source, i.e. port number are determined.Primary sound
When source scale L is less than 0.1 times of wavelength, secondary sound source number N must be greater than 4；When for primary sound source size L close to 0.3 times of wavelength,
Secondary sound source number N must be greater than 12.
(4) it determines error microphone number and lays region.Enable error microphone identical as secondary sound source number, each error
Microphone is located on the line of the primary sound source acoustic centre of source and each secondary sound source, and is located among primary sound source and secondary sound source, respectively
The distance of error microphone to primary sound source geometric center is denoted as r.
(5) it is calculated according to position of the target frequency to error microphone.Assuming that sound source is monopole primary sound source, source
Strong qpFor 1m/s3, calculate separately by cost function of system radiated and using error microphone acoustic pressure quadratic sum as cost letter
When number, secondary sound source source strength qs0And qsExpression formula
R in formulaSs, iIt is secondary sound source at a distance from i-th of secondary sound source, rSe, iFor error microphone and i-th grade sound
The distance in source, k are wave number, and k=2 π f/c, f are target frequency, and c is the velocity of sound.For specifying target frequency, will | qsm-qsm0| it is minimum
Change acquires Optimal error microphone placement and primary Sound Source Center distance r under the frequency.Attached drawing 2 gives 4,6,8,
12, the respective value of r at different frequencies when 20 port number.
3, beneficial effect：Remarkable advantage of the present invention is：It is proposed a kind of multi-channel Active Noise radiation control system error
Microphone lays method.Since this method uses near field sensing strategy, the optimization of region between primary sound source and secondary sound source
The optimum arrangement position of error microphone, system compact, noise reduction are big out；And in system channel number abundance, Optimal error is passed
Sound device is influenced small by primary sound source characteristic, is implemented simple.
Four, Detailed description of the invention
Fig. 1 is to lay schematic diagram in 8 channel active noise radiation control systems.
Fig. 2 is the optimum arrangement position of error microphone with the change curve of frequency.
Fig. 3 is that far field evaluation point lays scheme in specific embodiment.
Fig. 4 is that primary sound source and control system lay scheme in specific embodiment.
Fig. 5 is the acoustic pressure field pattern controlled on anterior-posterior horizontal face in specific embodiment emulation.
Fig. 6 be specific embodiment emulation and experiment in noise reduction with error microphone change in location curve.
Five, specific embodiment
Below using the sub- noise source of class idol grade that 21 cun of speaker systems in free space are constituted as control object, mesh
Mark control frequency is 250Hz, and control target is that system global radiation acoustical power noise reduction is 10dB or more.Institute of the present invention is discussed in detail
State the realization process of method.As shown in Fig. 3, it uses radius for the hemispherical support of 1.5m in anechoic room, is marked according to the world
Quasi- ISO 3744：1994 tables B.1 in 10 acoustical power point location arrangements evaluation points, measure 10 evaluation point acoustic pressure quadratic sums
Average noise reduction carrys out the global noise reduction effect of evaluation system.
(1) as shown in Fig. 4, primary sound source local environment is whole elimination room, meets free found field condition.With two-loudspeaker
Geometric center of the midpoint of line as primary sound source, the distance for measuring 2 loudspeaker distance primary sound sources is 0.10m, therefore
Remember that the scale L of primary sound source is 0.10m.It is 250Hz according to control target frequency f, calculating corresponding wavelength is about 1.36m, meets L
Less than 0.3 times of requirement of target frequency corresponding wavelength.
(2) as shown in Fig. 4, select 1 cun of loudspeaker with back chamber as secondary sound source, secondary sound source and primary sound source sound
The distance d at center should be less than 0.68m；Consider live physical condition, determines that secondary sound source is with primary Sound Source Center distance d
0.45m。
(3) as shown in Fig. 4, the control target for being 10dB or more according to system global radiation acoustical power noise reduction, with system
Global radiation acoustical power is cost function, successively to different number secondary sources when 250Hz noise reduction emulate, 8 is logical in emulation
Road can realize that 13.3dB meets noise reduction target.Determine that secondary source number N is 8, cloth is placed on primary sound respectively by 8 secondary sound sources
Source geometric center is 8 vertex of the regular hexahedron of body-centered.
(4) as shown in Fig. 4, determine that error microphone number is 8, cloth is placed on primary sound respectively by 8 error microphones
On the line of source and secondary sound source, and it is located at region between primary sound source and secondary sound source.
(5) according to target frequency 250Hz, formula (1) and formula (2) are substituted into, will | qs-qs0| minimum acquires error under the frequency
Microphone optimum arrangement position is 0.775d, i.e. 0.35m with primary Sound Source Center distance r.Select multichannel harmonic controller
The reference signal of TigerANC WIFI-M, internal directly synthesis 250Hz are controlled.Attached drawing 5 is to control anterior-posterior horizontal in emulation
Sound-filed simulation figure on face, attached drawing 6 is the curve of noise reduction and error microphone position in experiment, in Optimal error microphone cloth
Putting position r is that noise reduction is 11.8dB at 0.35m, and noise reduction effect is more preferable when ratio error microphone is in other positions.
Claims (7)
1. a kind of multi-channel Active Noise radiation control system error microphone lays method, it is characterised in that it includes following
Step：
(1) scale for measuring primary sound source, determines the position of primary sound source geometric center；
(2) according to live physical condition, determine secondary sound source most preferably lays distance；
(3) according to the computing resource of controller and noise reduction index, secondary sound source number, i.e. port number are determined；
(4) it according to the number and location of secondary source, determines error dot number and lays region；
(5) the optimum arrangement position of error microphone is determined according to target control frequency.
2. the measurement method of primary sound source as described in claim 1, it is characterised in that primary sound source should be in free space,
Surface is denoted as the scale L of primary sound source to the farthest distance of geometric center, it is desirable that L is less than highest goal frequency corresponding wavelength
0.3 times.
3. secondary sound source as described in claim 1 most preferably lays determination of distance method, it is characterised in that secondary source and primary sound
The distance of source geometric center is d, and d is necessarily less than 0.5 times of highest goal frequency corresponding wavelength and answers as small as possible.
4. secondary sound source as described in claim 1 lays mode, it is characterised in that secondary sound source is in the geometry of primary sound source
It is spherical to be uniformly distributed centered on the heart；For example, secondary sound source placement may respectively be 4 apexes of positive tetrahedron, positive eight
20 tops of 6 apexes of face body, 8 apexes of regular hexahedron, 12 apexes of regular dodecahedron, regular dodecahedron
At point.
5. the determination method of secondary sound source number as described in claim 1, it is characterised in that primary sound source size L is less than 0.1 times
When wavelength, secondary sound source number N is greater than 4；When primary sound source size L is close to 0.3 times of wavelength, secondary sound source number N is greater than 12.
6. error microphone number as described in claim 1 and the determination method for laying region, it is characterised in that error microphone
Number is identical as secondary sound source number, and each error microphone is located on the line of the primary sound source acoustic centre of source and each secondary sound source, and
Among primary sound source and secondary sound source, the distance of each error microphone to primary sound source geometric center is r.
7. error microphone optimum arrangement method for determining position as described in claim 1, it is characterised in that be directed to target control
Frequency is calculated separately by formula (1) and formula (2) using system radiated as cost function using monopole primary Source Model
Secondary sound source source strength expression formula when with using error microphone acoustic pressure quadratic sum as cost function is incited somebody to action in specified target frequency |
qsm-qsm0| minimum acquires Optimal error microphone placement and primary Sound Source Center distance r under the frequency,
R in formulaSs, iIt is secondary sound source at a distance from i-th of secondary sound source, rSe, iFor error microphone and i-th secondary sound source
Distance, k are wave number, and k=2 π f/c, f are target frequency, and c is the velocity of sound.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111339651A (en) * | 2020-02-22 | 2020-06-26 | 西北工业大学 | Secondary sound source layout optimization method for decoupling error sensor layout information |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101389158A (en) * | 2008-10-22 | 2009-03-18 | 南京大学 | Combined secondary sound source design method applied to active noise control |
| CN101521008A (en) * | 2009-04-02 | 2009-09-02 | 南京大学 | Active sound-absorption taper and manufacture method thereof |
| WO2011015979A2 (en) * | 2009-08-07 | 2011-02-10 | Koninklijke Philips Electronics N.V. | Active sound reduction system and method |
| CN102722607A (en) * | 2012-05-25 | 2012-10-10 | 山东大学 | Method for optimizing parameters of secondary sound source in active noise reduction of power transformer |
| CN102723076A (en) * | 2012-05-31 | 2012-10-10 | 四川正升环保科技有限公司 | Multi-channel active noise control system |
| CN104036065A (en) * | 2014-03-26 | 2014-09-10 | 浙江大学 | Optimal distribution based noise control method |
| WO2017000814A1 (en) * | 2015-06-30 | 2017-01-05 | 芋头科技（杭州）有限公司 | Active noise control system |
| CN106504739A (en) * | 2016-11-01 | 2017-03-15 | 西北工业大学 | The error pick-up of helicopter cabin overall situation Active noise control using lays optimization method |
| CN106504740A (en) * | 2016-11-24 | 2017-03-15 | 国家电网公司 | A kind of reduction method and its device |
| CN107767855A (en) * | 2017-09-15 | 2018-03-06 | 南京大学 | A kind of active broadband sound arrester for wall ventilation |
-
2018
- 2018-05-16 CN CN201810485569.XA patent/CN108877762A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101389158A (en) * | 2008-10-22 | 2009-03-18 | 南京大学 | Combined secondary sound source design method applied to active noise control |
| CN101521008A (en) * | 2009-04-02 | 2009-09-02 | 南京大学 | Active sound-absorption taper and manufacture method thereof |
| WO2011015979A2 (en) * | 2009-08-07 | 2011-02-10 | Koninklijke Philips Electronics N.V. | Active sound reduction system and method |
| CN102722607A (en) * | 2012-05-25 | 2012-10-10 | 山东大学 | Method for optimizing parameters of secondary sound source in active noise reduction of power transformer |
| CN102723076A (en) * | 2012-05-31 | 2012-10-10 | 四川正升环保科技有限公司 | Multi-channel active noise control system |
| CN104036065A (en) * | 2014-03-26 | 2014-09-10 | 浙江大学 | Optimal distribution based noise control method |
| WO2017000814A1 (en) * | 2015-06-30 | 2017-01-05 | 芋头科技（杭州）有限公司 | Active noise control system |
| CN106504739A (en) * | 2016-11-01 | 2017-03-15 | 西北工业大学 | The error pick-up of helicopter cabin overall situation Active noise control using lays optimization method |
| CN106504740A (en) * | 2016-11-24 | 2017-03-15 | 国家电网公司 | A kind of reduction method and its device |
| CN107767855A (en) * | 2017-09-15 | 2018-03-06 | 南京大学 | A kind of active broadband sound arrester for wall ventilation |
Non-Patent Citations (2)
| Title |
|---|
| JIANCHENG TAO等: "ERROR MICROPHONE LOCATION STUDY FOR AN EIGHTCHANNEL ANC SYSTEM IN FREE SPACE", 《25TH INTERNATIONAL CONGRESS ON SOUND AND VIBRATION 2018》 * |
| 郭琴: "《传声器风噪声和防风罩降噪性能仿真研究》", 《声学技术》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111339651A (en) * | 2020-02-22 | 2020-06-26 | 西北工业大学 | Secondary sound source layout optimization method for decoupling error sensor layout information |
| CN111339651B (en) * | 2020-02-22 | 2022-06-14 | 西北工业大学 | Secondary sound source layout optimization method for decoupling error sensor layout information |
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